Sir John Major believes Boris Johnson acted like a dishonest estate agent and lied when he prorogued Parliament because he had ‘ulterior motives’ linked to Brexit, the Supreme Court heard today. The former Tory prime minister, the lynchpin in the case brought by arch-Remainer Gina Miller, says the current Tory leader unlawfully shut down the Commons for five weeks and his reasons ‘cannot be true’. His stinging assessment about the motivations of his party’s leader are aimed at delivering a sledgehammer blow in the landmark legal battle, but Sir John stayed away from the Supreme Court today. The former Tory leader, 76, who lost his grip on power because of eurosceptics in his party he branded b***tards’, has faced accusations of hypocrisy from allies of Mr Johnson who argue that when he was in No10 he prorogued parliament in 1997 to delay publication of a report into the cash-for-questions scandal until after that year’s general election. But his lawyer Lord Garnier QC, a former Tory Solicitor General, denied Sir John was a hypocrite insisting that his decision to prorogue was not done for ‘base political reasons’. It is one of two historic appeals being heard at the UK’s highest court over the next three days…